
// GRaphAppDlg.cpp : implementation file
//

#include "stdafx.h"
#include "GRaphApp.h"
#include "GRaphAppDlg.h"
#include "afxdialogex.h"
#include "FiguraFactory.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialogEx
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CGRaphAppDlg dialog




CGRaphAppDlg::CGRaphAppDlg(CWnd* pParent /*=NULL*/)
	: CDialogEx(CGRaphAppDlg::IDD, pParent)
	, m_strCoord(_T(""))
	,_selectedFigure(NULL)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	_drawState = NOD;
	_updateState = 0;
}

CGRaphAppDlg::~CGRaphAppDlg()
{
	for (vector<Figure*>::iterator it = _figures.begin();it != _figures.end();)
	{
		vector<Figure*>::iterator itDelete = it++;
		delete *itDelete;
	}
}

void CGRaphAppDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialogEx::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_EDIT1, m_strCoord);
}

BEGIN_MESSAGE_MAP(CGRaphAppDlg, CDialogEx)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_COMMAND(ID_NOD,&CGRaphAppDlg::OnDrawNod)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
    ON_WM_LBUTTONUP()
END_MESSAGE_MAP()


// CGRaphAppDlg message handlers

BOOL CGRaphAppDlg::OnInitDialog()
{
	CDialogEx::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		BOOL bNameValid;
		CString strAboutMenu;
		bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
		ASSERT(bNameValid);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here

	CMenu menu;
	menu.LoadMenu(IDR_MENU1);

	this->SetMenu(&menu);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CGRaphAppDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialogEx::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CGRaphAppDlg::OnPaint()
{
	CPaintDC dc(this);
	if (IsIconic())
	{
		 // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);

	}
	else
	{
		for (vector<Figure*>::iterator it = _figures.begin();it != _figures.end();it++)
		{
			(*it)->Draw(&dc);
		}
		CDialogEx::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CGRaphAppDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CGRaphAppDlg::OnDrawNod()
{
	_drawState = NOD;
}

void CGRaphAppDlg::OnDrawLine()
{
	_drawState = MUCHIE;
}

void CGRaphAppDlg::OnLButtonDown( UINT nFlags, CPoint point )
{
	_selectedFigure = GetSelectedFigure(nFlags,point);	
    _figureSelectedPoint = point;
	//_selectedFigure->Invalidate(AfxGetApp()->GetMainWnd()->m_hWnd);
	_updateState = 0;
    SetCapture();
    Invalidate();

}

void CGRaphAppDlg::OnMouseMove(UINT nFlags, CPoint point)
{

	if (nFlags & MK_LBUTTON && _selectedFigure)
	{
		UpdateSelectedFigure(point);
        Invalidate();
	}
	m_strCoord.Format(_T("%d , %d"),point.x,point.y);
	UpdateData(FALSE);

}

void CGRaphAppDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
    if (this == GetCapture())
        ReleaseCapture();
}

Figure* CGRaphAppDlg::GetSelectedFigure(const UINT nFlags,const CPoint& point)
{
	for (vector<Figure*>::iterator it = _figures.begin(); it != _figures.end();++it)
	{
		if ((*it)->HasPoint(point))
			return *it;
	}
    
    CRect rect;
    GetClientRect(&rect);
	Figure* newFigure = FiguraFactory::CreateFigure(_drawState,rect,point);
    if (newFigure && CheckNodeCollision(newFigure,newFigure->GetBoundRect()))
	    _figures.push_back(newFigure);
    else
    {
        delete newFigure;
        newFigure = NULL;
    }
	return newFigure;
}

void CGRaphAppDlg::UpdateSelectedFigure(const CPoint& point)
{
	CRect rect;
	GetClientRect(&rect);
	if ((_updateState == 0 && _selectedFigure->HasPointOnBorder(point) || _updateState == 1) && CheckNodeCollision(_selectedFigure,_selectedFigure->GetMoveRect(point,_figureSelectedPoint)))
	{
		_selectedFigure->UpdateSize(point,rect);
		_updateState = 1;
	}
	else if (_updateState == 0 || _updateState == 2)
	{
		if ( CheckNodeCollision(_selectedFigure,_selectedFigure->GetMoveRect(point,_figureSelectedPoint)))
        {
            _selectedFigure->Move(point,_figureSelectedPoint,rect);
            _updateState = 2;
        }
	}
}

bool CGRaphAppDlg::CheckNodeCollision( const Figure* figure, const CRect& checkFigure )
{
	 for (vector<Figure*>::iterator it = _figures.begin();it != _figures.end(); ++it)
         if (figure != (*it) && (*it)->IntersectWith(checkFigure))
             return false;
	 return true;
 } 